public int[] Write(int[] serverHandles, object[] values)
{
var ppErrors = IntPtr.Zero;
SyncIO.Write(serverHandles.Length, serverHandles, values, out ppErrors);
return(ComUtils.GetInt32s(ref ppErrors, serverHandles.Length, true));
}
/// <summary>
/// Fetches the available locales.
/// </summary>
public int[] QueryAvailableLocales()
{
string methodName = "IOPCCommon.QueryAvailableLocales";
try
{
IOPCCommon server = BeginComCall <IOPCCommon>(methodName, true);
// query for available locales.
int count = 0;
IntPtr pLocaleIDs = IntPtr.Zero;
server.QueryAvailableLocaleIDs(out count, out pLocaleIDs);
// unmarshal results.
return(ComUtils.GetInt32s(ref pLocaleIDs, count, true));
}
catch (Exception e)
{
ComCallError(methodName, e);
return(null);
}
finally
{
EndComCall(methodName);
}
}
public int[] SetDataTypes(int[] serverHandles, short[] requestedDataTypes)
{
var ppErrors = IntPtr.Zero;
ItemMgt.SetDatatypes(serverHandles.Length, serverHandles, requestedDataTypes, out ppErrors);
return(ComUtils.GetInt32s(ref ppErrors, serverHandles.Length, true));
}
public int[] SetActiveState(int[] serverHandles, bool isActive)
{
var ppErrors = IntPtr.Zero;
ItemMgt.SetActiveState(serverHandles.Length, serverHandles, isActive ? 1 : 0, out ppErrors);
return(ComUtils.GetInt32s(ref ppErrors, serverHandles.Length, true));
}
public int[] SetClientHandles(int[] serverHandles, int[] clientHandles)
{
var ppErrors = IntPtr.Zero;
ItemMgt.SetClientHandles(serverHandles.Length, serverHandles, clientHandles, out ppErrors);
return(ComUtils.GetInt32s(ref ppErrors, serverHandles.Length, true));
}
/// <summary>
/// Writes the values for a set of items.
/// </summary>
public int[] SyncWrite(int[] serverHandles, object[] values, int count)
{
// initialize output parameters.
IntPtr pErrors = IntPtr.Zero;
string methodName = "IOPCSyncIO.Write";
try
{
IOPCSyncIO server = BeginComCall <IOPCSyncIO>(methodName, true);
server.Write(
count,
serverHandles,
values,
out pErrors);
}
catch (Exception e)
{
ComUtils.TraceComError(e, methodName);
return(null);
}
finally
{
EndComCall(methodName);
}
// unmarshal output parameters.
return(ComUtils.GetInt32s(ref pErrors, count, true));
}
public int[] RemoveItems(int[] serverHandles)
{
var ppErrors = IntPtr.Zero;
ItemMgt.RemoveItems(serverHandles.Length, serverHandles, out ppErrors);
return(ComUtils.GetInt32s(ref ppErrors, serverHandles.Length, true));
}
public int[] AsyncWrite(int connection, int[] serverHandles, object[] values, out int transactionId)
{
var ppErrors = IntPtr.Zero;
AsyncIO.Write(connection, serverHandles.Length, serverHandles, values, out transactionId, out ppErrors);
return(ComUtils.GetInt32s(ref ppErrors, serverHandles.Length, true));
}
public int[] AsyncRead(int connection, OpcDataSource source, int[] serverHandles, out int transactionId)
{
var ppErrors = IntPtr.Zero;
AsyncIO.Read(connection, (OPCDATASOURCE)source, serverHandles.Length, serverHandles, out transactionId, out ppErrors);
return(ComUtils.GetInt32s(ref ppErrors, serverHandles.Length, true));
}
/// <summary>
/// Gets the property item ids.
/// </summary>
/// <param name="itemId">The item id.</param>
/// <param name="properties">The properties to update.</param>
private void GetPropertyItemIds(string itemId, DaProperty[] properties)
{
string methodName = "IOPCItemProperties.LookupItemIDs";
int count = properties.Length;
// get list of ids to request.
int[] propertyIds = new int[count];
for (int ii = 0; ii < propertyIds.Length; ii++)
{
propertyIds[ii] = properties[ii].PropertyId;
}
// request the item ids.
IntPtr pItemIds = IntPtr.Zero;
IntPtr pErrors = IntPtr.Zero;
try
{
IOPCItemProperties server = BeginComCall <IOPCItemProperties>(methodName, true);
server.LookupItemIDs(
itemId,
count,
propertyIds,
out pItemIds,
out pErrors);
}
catch (Exception e)
{
if (ComUtils.IsUnknownError(e, ResultIds.E_FAIL, ResultIds.E_UNKNOWNITEMID, ResultIds.E_INVALIDITEMID))
{
ComUtils.TraceComError(e, methodName);
}
return;
}
finally
{
EndComCall(methodName);
}
// unmarshal results.
string[] itemIds = ComUtils.GetUnicodeStrings(ref pItemIds, count, true);
int[] errors = ComUtils.GetInt32s(ref pErrors, count, true);
// update the objects.
for (int ii = 0; ii < count; ii++)
{
if (errors[ii] >= 0)
{
properties[ii].ItemId = itemIds[ii];
}
else
{
properties[ii].ItemId = null;
}
}
}
/// <summary>
/// Gets the event categories.
/// </summary>
/// <param name="eventType">Type of the event.</param>
/// <param name="categories">The categories.</param>
/// <param name="descriptions">The descriptions.</param>
public void GetEventCategories(int eventType, out int[] categories, out string[] descriptions)
{
string methodName = "IOPCEventServer.QueryEventCategories";
int count = 0;
IntPtr pCategories = IntPtr.Zero;
IntPtr pDescriptions = IntPtr.Zero;
try
{
IOPCEventServer server = BeginComCall <IOPCEventServer>(methodName, true);
server.QueryEventCategories(
eventType,
out count,
out pCategories,
out pDescriptions);
}
catch (Exception e)
{
ComCallError(methodName, e);
}
finally
{
EndComCall(methodName);
}
// unmarshal results.
categories = ComUtils.GetInt32s(ref pCategories, count, true);
descriptions = ComUtils.GetUnicodeStrings(ref pDescriptions, count, true);
}
public int[] QueryAvailableLocaleIDs()
{
var pdwCount = 0;
var pdwLcid = IntPtr.Zero;
_server.QueryAvailableLocaleIDs(out pdwCount, out pdwLcid);
return(ComUtils.GetInt32s(ref pdwLcid, pdwCount, true));
}
public void QueryAvailableProperties(string itemId)
{
var pdwCount = 0;
var ppPropertyIds = IntPtr.Zero;
var ppDescriptions = IntPtr.Zero;
var ppvtDataTypes = IntPtr.Zero;
_server.QueryAvailableProperties(itemId, out pdwCount, out ppPropertyIds, out ppDescriptions, out ppvtDataTypes);
if (pdwCount > 0)
{
var ids = ComUtils.GetInt32s(ref ppPropertyIds, pdwCount, true);
var descs = ComUtils.GetUnicodeStrings(ref ppDescriptions, pdwCount, true);
var types = ComUtils.GetInt16s(ref ppvtDataTypes, pdwCount, true);
}
}
public OpcItemResult[] AddItems(OpcItemDefine[] items)
{
var rawItems = items.Select(item => new OPCITEMDEF
{
bActive = item.IsActive ? 1 : 0,
hClient = item.ClientHandle,
szAccessPath = item.AccessPath,
szItemID = item.ItemId,
vtRequestedDataType = item.RequestedDataType
})
.ToArray();
var ppAddResults = IntPtr.Zero;
var ppErrors = IntPtr.Zero;
ItemMgt.AddItems(items.Length, rawItems, out ppAddResults, out ppErrors);
var errors = ComUtils.GetInt32s(ref ppErrors, items.Length, true);
var results = GetStructures <OPCITEMRESULT>(ppAddResults, items.Length).Zip(errors, (r, e) =>
{
try
{
if (r.pBlob != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(r.pBlob);
r.pBlob = IntPtr.Zero;
}
return(new OpcItemResult
{
AccessRights = r.dwAccessRights,
CanonicalDataType = r.vtCanonicalDataType,
ErrorCode = e,
ServerHandle = r.hServer
});
}
catch (Exception ex)
{
return(new OpcItemResult {
ErrorCode = ex.HResult
});
}
})
.ToArray();
return(results);
}
/// <summary>
/// Reads the values for a set of items.
/// </summary>
public DaValue[] SyncRead(int[] serverHandles, int count)
{
// initialize output parameters.
IntPtr pValues = IntPtr.Zero;
IntPtr pErrors = IntPtr.Zero;
if (count > 0)
{
string methodName = "IOPCSyncIO.Read";
try
{
IOPCSyncIO server = BeginComCall <IOPCSyncIO>(methodName, true);
server.Read(
OPCDATASOURCE.OPC_DS_DEVICE,
count,
serverHandles,
out pValues,
out pErrors);
}
catch (Exception e)
{
ComUtils.TraceComError(e, methodName);
return(null);
}
finally
{
EndComCall(methodName);
}
}
// unmarshal output parameters.
DaValue[] values = GetItemValues(ref pValues, count, true);
int[] errors = ComUtils.GetInt32s(ref pErrors, count, true);
// save error codes.
for (int ii = 0; ii < count; ii++)
{
values[ii].Error = errors[ii];
}
return(values);
}
/// <summary>
/// Returns the filter currently in use for event subscriptions.
/// </summary>
/// <param name="pdwEventType">Bit map specifying which event types are of allowed through the filter</param>
/// <param name="pdwNumCategories">Length of the event category array returned.</param>
/// <param name="ppdwEventCategories">Array of event categories for the filter.</param>
/// <param name="pdwLowSeverity">Lowest severity allowed through filter.</param>
/// <param name="pdwHighSeverity">Highest severity allowed through filter.</param>
/// <param name="pdwNumAreas">Length of the area list array returned.</param>
/// <param name="ppszAreaList">List of process areas for the filter.</param>
/// <param name="pdwNumSources">Length of the event source list returned.</param>
/// <param name="ppszSourceList">List of sources for the filter.</param>
public void GetFilter(out int pdwEventType, out int pdwNumCategories, out IntPtr ppdwEventCategories, out int pdwLowSeverity, out int pdwHighSeverity, out int pdwNumAreas, out IntPtr ppszAreaList, out int pdwNumSources, out IntPtr ppszSourceList)
{
pdwEventType = 0;
pdwNumCategories = 0;
ppdwEventCategories = IntPtr.Zero;
pdwLowSeverity = 0;
pdwHighSeverity = 0;
pdwNumAreas = 0;
ppszAreaList = IntPtr.Zero;
pdwNumSources = 0;
ppszSourceList = IntPtr.Zero;
try
{
pdwEventType = m_dwEventType;
pdwLowSeverity = m_dwLowSeverity;
pdwHighSeverity = m_dwHighSeverity;
if (m_EventCategoryVector.Count != 0)
{
int[] EventCategoryIDs = m_EventCategoryVector.ToArray();
pdwNumCategories = m_EventCategoryVector.Count;
ppdwEventCategories = ComUtils.GetInt32s(EventCategoryIDs);
}
if (m_AreaVector.Count != 0)
{
string[] Areas = m_AreaVector.ToArray();
pdwNumAreas = m_AreaVector.Count;
ppszAreaList = ComUtils.GetUnicodeStrings(Areas);
}
if (m_SourceVector.Count != 0)
{
string[] Sources = m_SourceVector.ToArray();
pdwNumSources = m_SourceVector.Count;
ppszSourceList = ComUtils.GetUnicodeStrings(Sources);
}
}
catch (Exception e)
{
Utils.Trace(e, "Unexpected error in GetFilter");
throw ComUtils.CreateComException(e);
}
}
public OpcItemState[] Read(OpcDataSource source, int[] serverHandles)
{
var ppItemValues = IntPtr.Zero;
var ppErrors = IntPtr.Zero;
SyncIO.Read((OPCDATASOURCE)source, serverHandles.Length, serverHandles, out ppItemValues, out ppErrors);
var errors = ComUtils.GetInt32s(ref ppErrors, serverHandles.Length, true);
var values = GetStructures <OPCITEMSTATE>(ppItemValues, serverHandles.Length)
.Zip(errors, (v, e) => new OpcItemState
{
ClientHandle = v.hClient,
DataValue = v.vDataValue,
ErrorCode = e,
Quality = v.wQuality,
Timestamp = ComUtils.GetDateTime(v.ftTimeStamp)
})
.ToArray();
return(values);
}
/// <summary>
/// Retrieves the attributes which are currently specified to be returned with event notifications in the IOPCEventSink::OnEvent callback.
/// </summary>
/// <param name="dwEventCategory">The specific event category for which to retrieve the list of attributes.</param>
/// <param name="pdwCount">The size of the attribute IDs array which is being returned. Is set to zero if no attributes are currently specified.</param>
/// <param name="ppdwAttributeIDs">The list IDs of the attributes which are currently specified to be returned with event notifications for the event type and event category specified.</param>
public void GetReturnedAttributes(int dwEventCategory, out int pdwCount, out IntPtr ppdwAttributeIDs)
{
pdwCount = 0;
ppdwAttributeIDs = IntPtr.Zero;
try
{
// Make sure we are passed a valid dwEventCategory
NodeId catNodeId = m_server.FindEventCatNodeId(dwEventCategory);
if (catNodeId == null)
{
throw ComUtils.CreateComException("SetFilter", ResultIds.E_INVALIDARG);
}
lock (m_csData)
{
ReturnedAttributeList ras;
if (m_ReturnedAttributes.TryGetValue(dwEventCategory, out ras))
{
pdwCount = ras.Count;
int[] attrIDs = ras.ToArray();
ppdwAttributeIDs = ComUtils.GetInt32s(attrIDs);
}
}
}
catch (COMException e)
{
throw ComUtils.CreateComException(e);
}
catch (Exception e)
{
Utils.Trace(e, "Unexpected error in GetReturnedAttributes");
throw ComUtils.CreateComException(e);
}
}
/// <summary>
/// Read the available non-built in properties from the server.
/// </summary>
/// <param name="itemId">The item id.</param>
/// <param name="updateCache">if set to <c>true</c> the cache is updated.</param>
/// <returns>The array of properties.</returns>
public DaProperty[] ReadAvailableProperties(string itemId, bool updateCache)
{
string methodName = "IOPCItemProperties.QueryAvailableProperties";
// query for available properties.
int count = 0;
IntPtr pPropertyIds = IntPtr.Zero;
IntPtr pDescriptions = IntPtr.Zero;
IntPtr pDataTypes = IntPtr.Zero;
try
{
IOPCItemProperties server = BeginComCall <IOPCItemProperties>(methodName, true);
server.QueryAvailableProperties(
itemId,
out count,
out pPropertyIds,
out pDescriptions,
out pDataTypes);
}
catch (Exception e)
{
if (ComUtils.IsUnknownError(e, ResultIds.E_FAIL, ResultIds.E_UNKNOWNITEMID, ResultIds.E_INVALIDITEMID))
{
ComUtils.TraceComError(e, methodName);
}
return(null);
}
finally
{
EndComCall(methodName);
}
// unmarshal results.
int[] propertyIds = ComUtils.GetInt32s(ref pPropertyIds, count, true);
string[] descriptions = ComUtils.GetUnicodeStrings(ref pDescriptions, count, true);
short[] datatype = ComUtils.GetInt16s(ref pDataTypes, count, true);
List <DaProperty> properties = new List <DaProperty>();
for (int ii = 0; ii < count; ii++)
{
// do not return any of the built in properties.
if (propertyIds[ii] <= PropertyIds.TimeZone)
{
continue;
}
DaProperty property = new DaProperty();
property.PropertyId = propertyIds[ii];
property.Name = descriptions[ii];
property.DataType = datatype[ii];
properties.Add(property);
}
// fetch the item ids.
if (properties.Count > 0)
{
DaProperty[] array = properties.ToArray();
GetPropertyItemIds(itemId, array);
// update the cache.
if (updateCache)
{
lock (m_cache)
{
DaElement element = null;
if (m_cache.TryGetValue(itemId, out element))
{
element.Properties = array;
}
}
}
return(array);
}
return(null);
}
/// <summary>
/// Removes the items from the group that have been marked as deleted.
/// </summary>
public void RemoveItems()
{
// count the number of items to remove.
List <GroupItem> itemsToRemove = new List <GroupItem>();
lock (Lock)
{
List <GroupItem> itemsToKeep = new List <GroupItem>();
for (int ii = 0; ii < m_items.Count; ii++)
{
if (m_items[ii].Deleted && m_items[ii].Created)
{
itemsToRemove.Add(m_items[ii]);
continue;
}
itemsToKeep.Add(m_items[ii]);
}
m_items = itemsToKeep;
}
// check if nothing to do.
if (itemsToRemove.Count == 0)
{
return;
}
// build list of items to remove.
int count = itemsToRemove.Count;
int[] serverHandles = new int[count];
for (int ii = 0; ii < itemsToRemove.Count; ii++)
{
serverHandles[ii] = itemsToRemove[ii].ServerHandle;
// remove the associated monitored items.
if (m_monitoredItems != null)
{
lock (m_monitoredItems)
{
m_monitoredItems.Remove(itemsToRemove[ii].ClientHandle);
}
}
}
IntPtr pErrors = IntPtr.Zero;
string methodName = "IOPCItemMgt.RemoveItems";
try
{
IOPCItemMgt server = BeginComCall <IOPCItemMgt>(methodName, true);
// remove items.
server.RemoveItems(
count,
serverHandles,
out pErrors);
}
catch (Exception e)
{
ComUtils.TraceComError(e, methodName);
for (int ii = 0; ii < itemsToRemove.Count; ii++)
{
itemsToRemove[ii].Created = false;
itemsToRemove[ii].ErrorId = Marshal.GetHRForException(e);
}
return;
}
finally
{
EndComCall(methodName);
}
// free returned error array.
int[] errors = ComUtils.GetInt32s(ref pErrors, count, true);
// save error codes.
for (int ii = 0; ii < count; ii++)
{
itemsToRemove[ii].Created = false;
itemsToRemove[ii].ErrorId = errors[ii];
}
/*
* Utils.Trace(
* "Group {0} RemoveItems({4}/{5}) {1}/{2}ms {3}%",
* m_clientHandle,
* m_samplingInterval,
* m_actualSamplingInterval,
* m_deadband,
* itemsToRemove.Count,
* m_items.Count);
*/
}
/// <summary>
/// Sets the active state for a set of items in a group.
/// </summary>
public void ActivateItems(bool active)
{
// count the number of items to activate.
List <GroupItem> itemsToActivate = new List <GroupItem>();
lock (Lock)
{
for (int ii = 0; ii < m_items.Count; ii++)
{
if (m_items[ii].ActiveChanged && m_items[ii].Active == active && m_items[ii].Created)
{
itemsToActivate.Add(m_items[ii]);
}
}
}
// check if nothing to do.
if (itemsToActivate.Count == 0)
{
return;
}
// build list of items to remove.
int count = itemsToActivate.Count;
int[] serverHandles = new int[count];
for (int ii = 0; ii < itemsToActivate.Count; ii++)
{
serverHandles[ii] = itemsToActivate[ii].ServerHandle;
}
// initialize output parameters.
IntPtr pErrors = IntPtr.Zero;
string methodName = "IOPCItemMgt.SetActiveState";
try
{
IOPCItemMgt server = BeginComCall <IOPCItemMgt>(methodName, true);
server.SetActiveState(
count,
serverHandles,
(active) ? 1 : 0,
out pErrors);
}
catch (Exception e)
{
ComUtils.TraceComError(e, methodName);
for (int ii = 0; ii < itemsToActivate.Count; ii++)
{
itemsToActivate[ii].ActiveChanged = false;
itemsToActivate[ii].ErrorId = Marshal.GetHRForException(e);
}
}
finally
{
EndComCall(methodName);
}
// free returned error array.
int[] errors = ComUtils.GetInt32s(ref pErrors, count, true);
// save error codes.
for (int ii = 0; ii < count; ii++)
{
itemsToActivate[ii].ActiveChanged = false;
itemsToActivate[ii].ErrorId = errors[ii];
}
/*
* Utils.Trace(
* "Group {0} ActivateItems({4}/{5}) {1}/{2}ms {3}%",
* m_clientHandle,
* m_samplingInterval,
* m_actualSamplingInterval,
* m_deadband,
* active,
* itemsToActivate.Count);
*/
}
/// <summary>
/// Adds all items to the group that have not already been added.
/// </summary>
public void AddItems()
{
// count the number of items to add.
List <GroupItem> itemsToAdd = new List <GroupItem>();
lock (Lock)
{
for (int ii = 0; ii < m_items.Count; ii++)
{
if (!m_items[ii].Created)
{
itemsToAdd.Add(m_items[ii]);
}
}
}
// check if nothing to do.
if (itemsToAdd.Count == 0)
{
return;
}
// create item definitions.
int count = itemsToAdd.Count;
OpcRcw.Da.OPCITEMDEF[] definitions = new OpcRcw.Da.OPCITEMDEF[count];
for (int ii = 0; ii < count; ii++)
{
definitions[ii] = new OpcRcw.Da.OPCITEMDEF();
definitions[ii].szItemID = itemsToAdd[ii].ItemId;
definitions[ii].bActive = (itemsToAdd[ii].Active) ? 1 : 0;
definitions[ii].szAccessPath = String.Empty;
definitions[ii].vtRequestedDataType = (short)VarEnum.VT_EMPTY;
definitions[ii].hClient = itemsToAdd[ii].ClientHandle;
}
// initialize output parameters.
IntPtr pResults = IntPtr.Zero;
IntPtr pErrors = IntPtr.Zero;
// add items to group.
string methodName = "IOPCItemMgt.AddItems";
try
{
IOPCItemMgt server = BeginComCall <IOPCItemMgt>(methodName, true);
server.AddItems(
count,
definitions,
out pResults,
out pErrors);
}
catch (Exception e)
{
ComUtils.TraceComError(e, methodName);
for (int ii = 0; ii < itemsToAdd.Count; ii++)
{
itemsToAdd[ii].ErrorId = Marshal.GetHRForException(e);
}
return;
}
finally
{
EndComCall(methodName);
}
// unmarshal output parameters.
int[] serverHandles = GetItemResults(ref pResults, count, true);
int[] errors = ComUtils.GetInt32s(ref pErrors, count, true);
// save handles and error codes.
for (int ii = 0; ii < count; ii++)
{
GroupItem item = itemsToAdd[ii];
item.ServerHandle = serverHandles[ii];
item.ErrorId = errors[ii];
if (item.ErrorId >= 0)
{
itemsToAdd[ii].Created = true;
}
}
/*
* Utils.Trace(
* "Group {0} AddItems({4}/{5}) {1}/{2}ms {3}%",
* m_clientHandle,
* m_samplingInterval,
* m_actualSamplingInterval,
* m_deadband,
* itemsToAdd.Count,
* m_items.Count);
*/
}
/// <summary>
/// Gets the event attributes.
/// </summary>
/// <param name="categoryId">The category id.</param>
/// <param name="attributeIds">The attribute ids.</param>
/// <param name="descriptions">The descriptions.</param>
/// <param name="datatypes">The datatypes.</param>
public bool GetEventAttributes(
int categoryId,
out int[] attributeIds,
out string[] descriptions,
out short[] datatypes)
{
string methodName = "IOPCEventServer.QueryEventAttributes";
int count = 0;
IntPtr pAttributeIds = IntPtr.Zero;
IntPtr pDescriptions = IntPtr.Zero;
IntPtr pDataTypes = IntPtr.Zero;
try
{
IOPCEventServer server = BeginComCall <IOPCEventServer>(methodName, true);
server.QueryEventAttributes(
categoryId,
out count,
out pAttributeIds,
out pDescriptions,
out pDataTypes);
}
catch (Exception e)
{
ComCallError(methodName, e);
}
finally
{
EndComCall(methodName);
}
// unmarshal results.
attributeIds = ComUtils.GetInt32s(ref pAttributeIds, count, true);
descriptions = ComUtils.GetUnicodeStrings(ref pDescriptions, count, true);
datatypes = ComUtils.GetInt16s(ref pDataTypes, count, true);
// remove the AREAS attribute which is never exposed.
for (int ii = 0; ii < count; ii++)
{
if (String.Compare(descriptions[ii], "AREAS", StringComparison.OrdinalIgnoreCase) == 0)
{
int[] attributeIds2 = new int[count - 1];
string[] descriptions2 = new string[count - 1];
short[] datatypes2 = new short[count - 1];
if (ii > 0)
{
Array.Copy(attributeIds, attributeIds2, ii);
Array.Copy(descriptions, descriptions2, ii);
Array.Copy(datatypes, datatypes2, ii);
}
if (ii < count - 1)
{
Array.Copy(attributeIds, ii + 1, attributeIds2, ii, count - ii - 1);
Array.Copy(descriptions, ii + 1, descriptions2, ii, count - ii - 1);
Array.Copy(datatypes, ii + 1, datatypes2, ii, count - ii - 1);
}
attributeIds = attributeIds2;
descriptions = descriptions2;
datatypes = datatypes2;
break;
}
}
return(count > 0);
}
/// <summary>
/// Reads the values of the properties from the server.
/// </summary>
/// <param name="itemId">The item id.</param>
/// <param name="propertyIds">The list of property ids to read. All properties are read if null.</param>
/// <returns>True if the element has properies.</returns>
private DaValue[] ReadPropertyValues(string itemId, params int[] propertyIds)
{
string methodName = "IOPCItemProperties.GetItemProperties";
// check for trivial case.
if (propertyIds == null)
{
return(null);
}
int count = propertyIds.Length;
DaValue[] results = new DaValue[count];
// check for empty list.
if (count == 0)
{
return(results);
}
// get the values from the server.
IntPtr pValues = IntPtr.Zero;
IntPtr pErrors = IntPtr.Zero;
try
{
IOPCItemProperties server = BeginComCall <IOPCItemProperties>(methodName, true);
server.GetItemProperties(
itemId,
count,
propertyIds,
out pValues,
out pErrors);
}
catch (Exception e)
{
if (ComUtils.IsUnknownError(e, ResultIds.E_FAIL, ResultIds.E_UNKNOWNITEMID, ResultIds.E_INVALIDITEMID))
{
ComUtils.TraceComError(e, methodName);
return(null);
}
for (int ii = 0; ii < count; ii++)
{
DaValue result = results[ii] = new DaValue();
result.Value = null;
result.Quality = OpcRcw.Da.Qualities.OPC_QUALITY_GOOD;
result.Timestamp = DateTime.UtcNow;
result.Error = Marshal.GetHRForException(e);
}
return(results);
}
finally
{
EndComCall(methodName);
}
// unmarshal results.
object[] values = ComUtils.GetVARIANTs(ref pValues, count, true);
int[] errors = ComUtils.GetInt32s(ref pErrors, count, true);
for (int ii = 0; ii < count; ii++)
{
DaValue result = results[ii] = new DaValue();
result.Value = ComUtils.ProcessComValue(values[ii]);
result.Quality = OpcRcw.Da.Qualities.OPC_QUALITY_GOOD;
result.Timestamp = DateTime.UtcNow;
result.Error = errors[ii];
}
return(results);
}
/// <summary>
/// Acknowledges the specified context.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="eventId">The event id.</param>
/// <param name="comment">The comment.</param>
/// <returns></returns>
public uint Acknowledge(
ServerSystemContext context,
byte[] eventId,
LocalizedText comment)
{
// get the user name from the context.
string userName = String.Empty;
if (context.UserIdentity != null)
{
userName = context.UserIdentity.DisplayName;
}
// get the comment.
string commentText = String.Empty;
if (comment != null)
{
commentText = comment.Text;
}
System.Runtime.InteropServices.ComTypes.FILETIME ftActiveTime;
// unpack the event id.
ServiceMessageContext messageContext = new ServiceMessageContext();
messageContext.NamespaceUris = context.NamespaceUris;
messageContext.ServerUris = context.ServerUris;
messageContext.Factory = context.EncodeableFactory;
BinaryDecoder decoder = new BinaryDecoder(eventId, messageContext);
string source = decoder.ReadString(null);
string conditionName = decoder.ReadString(null);
ftActiveTime.dwHighDateTime = decoder.ReadInt32(null);
ftActiveTime.dwLowDateTime = decoder.ReadInt32(null);
int cookie = decoder.ReadInt32(null);
decoder.Close();
string methodName = "IOPCEventServer.AckCondition";
IntPtr pErrors = IntPtr.Zero;
try
{
IOPCEventServer server = BeginComCall <IOPCEventServer>(methodName, true);
server.AckCondition(
1,
userName,
commentText,
new string[] { source },
new string[] { conditionName },
new System.Runtime.InteropServices.ComTypes.FILETIME[] { ftActiveTime },
new int[] { cookie },
out pErrors);
}
catch (Exception e)
{
ComCallError(methodName, e);
return(StatusCodes.BadUnexpectedError);
}
finally
{
EndComCall(methodName);
}
// unmarshal results.
int[] errors = ComUtils.GetInt32s(ref pErrors, 1, true);
if (errors[0] == ResultIds.S_ALREADYACKED)
{
return(StatusCodes.BadConditionBranchAlreadyAcked);
}
else if (errors[0] < 0)
{
return(StatusCodes.BadEventIdUnknown);
}
return(StatusCodes.Good);
}
